# Top Free Transactional Email Software - Page 3 ## How Many Transactional Email Software Products Does G2 Track? **Total Products under this Category:** 136 ### Category Stats (Jul 2026) - **Average Rating:** 4.41/5 (↑0.01 vs Jun 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Spotler SendPro (+1.75%) - Among all products in this category, Spotler SendPro recorded the largest rating increase compared to last month _Last updated: July 24, 2026_ ## How Does G2 Rank Transactional Email Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 31,700+ Authentic Reviews - 136+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. [ MailUp ](https://www.g2.com/products/mailup/reviews) By [Mailup](https://www.g2.com/sellers/mailup) [ 3.7/5(45) ](https://www.g2.com/products/mailup/reviews) What do users say? Users consistently praise the ease of use and excellent support provided by the platform, highlighting its intuitive interface and responsive assistance team. Many appreciate the ability to create cus [ MailerSend ](https://www.g2.com/products/mailersend/reviews) By [MailerSend](https://www.g2.com/sellers/mailersend) [ 4.1/5(46) ](https://www.g2.com/products/mailersend/reviews) What do users say? Users consistently praise the product for its ease of use and responsive customer support, making it a reliable choice for transactional email services. Many appreciate the generous free tier and stra Pros and Cons [ Expensive (1) ](https://www.g2.com/products/mailersend/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) [ Kingmailer ](https://www.g2.com/products/kingmailer/reviews) By [Kingmailer.co](https://www.g2.com/sellers/kingmailer-co) [ 3.8/5(10) ](https://www.g2.com/products/kingmailer/reviews) What do users say? Users consistently praise the user-friendly interface and responsive customer service of Kingmailer, highlighting its ease of setup and reliable email delivery. Many appreciate the competitive pricing [ Ongage ](https://www.g2.com/products/ongage-ongage/reviews) By [Ongage](https://www.g2.com/sellers/ongage-505abf4f-4b87-44ca-bc44-777e675921c2) [ 4.7/5(108) ](https://www.g2.com/products/ongage-ongage/reviews) What do users say? Users consistently praise Ongage for its user-friendly interface and responsive customer support, which make it easy to navigate and utilize effectively. Many appreciate the platform's flexibility in Pros and Cons [ Ease of Use (8) ](https://www.g2.com/products/ongage-ongage/reviews?qs=pros-and-cons)[ Email Issues (4) ](https://www.g2.com/products/ongage-ongage/reviews?qs=pros-and-cons) [ Tarvent ](https://www.g2.com/products/tarvent/reviews) By [Tarvent](https://www.g2.com/sellers/tarvent) [ 4.7/5(30) ](https://www.g2.com/products/tarvent/reviews) What do users say? Users consistently praise the ease of use and robust feature set of Tarvent, highlighting its intuitive interface and effective automation capabilities that simplify email marketing tasks. Many apprec Pros and Cons [ Ease of Use (5) ](https://www.g2.com/products/tarvent/reviews?qs=pros-and-cons)[ Software Bugs (3) ](https://www.g2.com/products/tarvent/reviews?qs=pros-and-cons) [ Transpond by Capsule ](https://www.g2.com/products/transpond-by-capsule/reviews) By [Capsule](https://www.g2.com/sellers/capsule-e141d0ba-26b3-4a7a-ae6c-2531a3dc3de4) [ 4.5/5(38) ](https://www.g2.com/products/transpond-by-capsule/reviews) What do users say? Users consistently praise the user-friendly interface and excellent customer support of Transpond, highlighting how easy it is to navigate and set up email campaigns. Many appreciate the seamless inte Pros and Cons [ Ease of Use (9) ](https://www.g2.com/products/transpond-by-capsule/reviews?qs=pros-and-cons)[ Lack of Features (3) ](https://www.g2.com/products/transpond-by-capsule/reviews?qs=pros-and-cons) [ AhaSend ](https://www.g2.com/products/ahasend/reviews) By [TakTek](https://www.g2.com/sellers/taktek) [ 4.8/5(6) ](https://www.g2.com/products/ahasend/reviews) Product Description AhaSend is a blazing fast pay as you go transactional email service. Transactional emails must reach the inbox quickly, and that is exactly where AhaSend excels. 💰 Fair and Transparent Pricing that Pros and Cons [ Customer Support (2) ](https://www.g2.com/products/ahasend/reviews?qs=pros-and-cons) [ Doppler Relay ](https://www.g2.com/products/doppler-relay/reviews) By [Making Sense](https://www.g2.com/sellers/making-sense) [ 4.8/5(6) ](https://www.g2.com/products/doppler-relay/reviews) Product Description Doppler Relay is a transactional email service, that guarantees the arrival of your Transactional Emails and allows you to access detailed analytics in real time. Sending attached files, invoices, car Pros and Cons [ Analytics (1) ](https://www.g2.com/products/doppler-relay/reviews?qs=pros-and-cons)[ Lack of Guidance (1) ](https://www.g2.com/products/doppler-relay/reviews?qs=pros-and-cons) [ ExpressPigeon ](https://www.g2.com/products/expresspigeon/reviews) By [Cisco](https://www.g2.com/sellers/cisco) [ 4.7/5(57) ](https://www.g2.com/products/expresspigeon/reviews) What do users say? Users consistently praise the ease of use and excellent customer service of ExpressPigeon, highlighting its intuitive interface that allows even non-technical users to create effective email campaigns [ Kasplo ](https://www.g2.com/products/kasplo/reviews) By [Kasplo Internet Pvt Ltd](https://www.g2.com/sellers/kasplo-internet-pvt-ltd) [ 4.7/5(27) ](https://www.g2.com/products/kasplo/reviews) What do users say? Users consistently praise the ease of use and excellent customer service provided by Kasplo, highlighting its user-friendly interface and responsive support team. Many appreciate the platform's abilit Pros and Cons [ Accuracy (1) ](https://www.g2.com/products/kasplo/reviews?qs=pros-and-cons)[ Communication Delays (1) ](https://www.g2.com/products/kasplo/reviews?qs=pros-and-cons) [ Turbosmtp ](https://www.g2.com/products/turbosmtp/reviews) By [Edisplay Srl](https://www.g2.com/sellers/edisplay-srl) [ 3.8/5(19) ](https://www.g2.com/products/turbosmtp/reviews) What do users say? Users consistently praise the product for its easy setup and excellent deliverability, noting that emails reliably reach recipients without issues. Many appreciate the straightforward configuration pr Pros and Cons [ Easy Setup (6) ](https://www.g2.com/products/turbosmtp/reviews?qs=pros-and-cons)[ Missing Features (3) ](https://www.g2.com/products/turbosmtp/reviews?qs=pros-and-cons) [ Halon Protect ](https://www.g2.com/products/halon-protect/reviews) By [Halon](https://www.g2.com/sellers/halon) [ 5/5(5) ](https://www.g2.com/products/halon-protect/reviews) Product Description Halon is a global email infrastructure company focusing on empowering service providers to control and maximize email, the world’s most important means of digital communication. Established in 2010, o Pros and Cons [ Automation (2) ](https://www.g2.com/products/halon-protect/reviews?qs=pros-and-cons)[ Difficult Learning (2) ](https://www.g2.com/products/halon-protect/reviews?qs=pros-and-cons) [ Infobip ](https://www.g2.com/products/infobip/reviews) By [Infobip](https://www.g2.com/sellers/infobip) [ 4.3/5(58) ](https://www.g2.com/products/infobip/reviews) What do users say? Users consistently praise the product for its ease of use and reliable messaging capabilities, making it a preferred choice for managing communications across various channels. The intuitive interface Pros and Cons [ Ease of Use (3) ](https://www.g2.com/products/infobip/reviews?qs=pros-and-cons)[ Poor Customer Support (3) ](https://www.g2.com/products/infobip/reviews?qs=pros-and-cons) [ ROUTEE ](https://www.g2.com/products/routee/reviews) By [AMD Telecom](https://www.g2.com/sellers/amd-telecom) [ 3.6/5(10) ](https://www.g2.com/products/routee/reviews) What do users say? Users consistently praise the product for its variety of communication options and ease of use, which enhance customer interaction and marketing reach. Many appreciate the responsive customer support Pros and Cons [ Automation (2) ](https://www.g2.com/products/routee/reviews?qs=pros-and-cons)[ Expensive (2) ](https://www.g2.com/products/routee/reviews?qs=pros-and-cons) [ Delivra ](https://www.g2.com/products/delivra/reviews) By [Delivra](https://www.g2.com/sellers/delivra) [ 4.3/5(84) ](https://www.g2.com/products/delivra/reviews) What do users say? Users consistently praise Delivra for its ease of use and responsive customer support, which help streamline email marketing efforts. The drag-and-drop editor and robust reporting tools enhance the ov Pros and Cons [ Automation (4) ](https://www.g2.com/products/delivra/reviews?qs=pros-and-cons)[ Difficult Automation (2) ](https://www.g2.com/products/delivra/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) - [‹ Prev‹ Prev](/categories/transactional-email/free?order=g2_score&page=2#product-list) - [1](/categories/transactional-email/free?order=g2_score#product-list) - [2](/categories/transactional-email/free?order=g2_score&page=2#product-list) - 3 - [4](/categories/transactional-email/free?order=g2_score&page=4#product-list) - [5](/categories/transactional-email/free?order=g2_score&page=5#product-list) - [Next ›Next ›](/categories/transactional-email/free?order=g2_score&page=4#product-list) Spotlight Categories [Generative AI Infrastructure Software](https://www.g2.com/categories/generative-ai-infrastructure) [Payment Processing Software](https://www.g2.com/categories/payment-processing) [Identity and Access Management (IAM) Software](https://www.g2.com/categories/identity-and-access-management-iam) [Virtual Event Platforms](https://www.g2.com/categories/virtual-event-platforms) [Customer Success Software](https://www.g2.com/categories/customer-success) Similar Categories - [Account-Based Marketing](/categories/account-based-marketing) - [Affiliate Marketing](/categories/affiliate-marketing) - [App Store Optimization](/categories/app-store-optimization) - [Audience Intelligence Platforms](/categories/audience-intelligence-platforms) - [B2B Services Review Platforms](/categories/b2b-services-review-platforms) - [Blogger Outreach](/categories/blogger-outreach) - [Book Marketing Tools](/categories/book-marketing-tools) - [Brand Intelligence](/categories/brand-intelligence) - [Consumer Insights Platforms](/categories/consumer-insights-platforms) - [Consumer Video Feedback](/categories/consumer-video-feedback) - [Content Curation](/categories/content-curation) - [Content Marketing](/categories/content-marketing) - [Conversational Marketing](/categories/conversational-marketing) - [Conversion Rate Optimization Tools](/categories/conversion-rate-optimization-tools) - [Customer Data Platform (CDP)](/categories/customer-data-platform-cdp) [Browse Transactional Email Themes](/categories/transactional-email/themes)